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Minor earthquake, 3.9 mag has occurred near Arecibo in Puerto Rico


Earthquake location 18.516S, -66.736WA minor earthquake magnitude 3.9 (ml/mb) has struck on Sunday, 5 kilometers (3 miles) from Arecibo in Puerto Rico. Exact location of earthquake, -66.736° West, 18.516° North, depth 93 km. The earthquake was roughly at a depth of 93 km (58 miles). Unique identifier: pr16192000. Ids that are associated to the event: at00oa2zwy, pr16192000, us100062bg. Exact time and date of event in UTC/GMT: 10/07/16 / 2016-07-10 04:17:21 / July 10, 2016 @ 4:17 am. The 3.9-magnitude earthquake has occurred at 00:17:21 / 12:17 am (local time epicenter).

Closest city/cities or villages, with min 5000 pop, to hypocenter/epicentrum was Guayama, Santa Barbara, Gurabo. Close country/countries that might be effected, Puerto Rico (c. 3 917 000 pop). Epicenter of the event was 67 km (41 miles) from San Juan (c. 418 100 pop), 63 km (39 miles) from Bayamón (c. 203 500 pop), 83 km (52 miles) from Carolina (c. 170 400 pop), 58 km (36 miles) from Ponce (c. 152 600 pop), 79 km (49 miles) from Caguas (c. 86 800 pop), 68 km (42 miles) from Guaynabo (c. 81 400 pop).

In the past 24 hours, there have been two, in the last 10 days nine, in the past 30 days seventeen and in the last 365 days two hundred and seventy-four earthquakes of magnitude 3.0 or greater that was reported nearby. Earthquakes 3.0 to 4.0 are often felt, but only causes minor damage. There are an estimated 130,000 minor earthquakes in the world each year.

Did you feel it?

How did you react? Was there any damage to buildings? Leave a comment or report about shaking, activity and damage at your home, city and country. Read more about the earthquake, Location, Distances, Seismometer information, Date-Time, Parameters and details about this quake, reported near: 5 km NNW of Arecibo, Puerto Rico. This information comes from the USGS Earthquake Notification Service.

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More information

Parameter Value Description
Magnitude 3.9 mb The magnitude for the event.
Longitude -66.736° West Decimal degrees longitude. Negative values for western longitudes.
Latitude 18.516° North Decimal degrees latitude. Negative values for southern latitudes.
Depth 93 km Depth of the event in kilometers.
Place 5km NNW of Arecibo, Puerto Rico Textual description of named geographic region near to the event. This may be a city name, or a Flinn-Engdahl Region name.
Time 2016-07-10 04:17:21 Time when the event occurred. UTC/GMT
Updated 2016-07-10 04:43:21 Time when the event was most recently updated. UTC/GMT
Timezone offset -240 Timezone offset from UTC in minutes at the event epicenter.
Felt 27 The total number of felt reports
CDI 3.4 The maximum reported intensity for the event.
MMI The maximum estimated instrumental intensity for the event.
Alert Level The alert level from the PAGER earthquake impact scale. Green, Yellow, Orange or Red.
Review Status REVIEWED Indicates whether the event has been reviewed by a human.
Tsunami 1 This flag is set to "1" for large events in oceanic regions and "0" otherwise. The existence or value of this flag does not indicate if a tsunami actually did or will exist.
SIG 243 A number describing how significant the event is. Larger numbers indicate a more significant event.
Network pr The ID of a data contributor. Identifies the network considered to be the preferred source of information for this event.
Sources ,at,pr,us, A comma-separated list of network contributors.
Number of Stations Used 61 The total number of Number of seismic stations which reported P- and S-arrival times for this earthquake.
Horizontal Distance 0.04401745 Horizontal distance from the epicenter to the nearest station (in degrees).
Root Mean Square 0.31 sec The root-mean-square (RMS) travel time residual, in sec, using all weights.
Azimuthal Gap 194.4 The largest azimuthal gap between azimuthally adjacent stations (in degrees).
Magnitude Type Ml The method or algorithm used to calculate the preferred magnitude for the event.
Event Type earthquake Type of seismic event.
Event ID pr16192000 Id of event.
Event Code 16192000 An identifying code assigned by, and unique from, the corresponding source for the event.
Event IDS ,at00oa2zwy,pr16192000,us100062bg, A comma-separated list of event ids that are associated to an event.

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